Template:Realworld
Production
January
- 2 January - Pato Guzman dies.
- 7 January - TNG: "Data's Day" airs.
- 7 January - 15 January - Seven days of filming on TNG: "Night Terrors" on Paramount Stage 8, 9, and 16.
- 8 January - Christian Maguire is born.
- 12 January - Keye Luke dies.
- 16 January - 25 January - Eight days of filming on TNG: "Identity Crisis" on Paramount Stage 8, 9, and 16.
- 22 January - Second unit and blue screen inserts were filmed on Paramount Stage 13 for the episodes TNG: "Clues" and TNG: "Night Terrors".
- 28 January - TNG: "The Wounded" airs.
- 28 January - 31 January - Four days of filming on TNG: "The Nth Degree".
- 30 January - An additional scene for TNG: "First Contact" was filmed on Paramount Stage 8.
February
- 1 February - 5 February - Three days of filming on TNG: "The Nth Degree".
- 4 February - TNG: "Devil's Due" airs.
- UK VHS releases: TOS volumes 37 and 38, TNG volume 9.
- 6 February - 15 February - Eight days of filming on TNG: "Qpid" including a location shoot at Descanso Gardens.
- 7 February - Don McDougall dies.
- 11 February - TNG: "Clues" airs.
- 18 February - TNG: "First Contact" airs.
- 19 February - 27 February - Seven days of filming on TNG: "The Drumhead".
- 22 February - Inserts shooting on Paramount Stage 8 and 16 for TNG: "The Nth Degree".
- 27 February - 28 February - Two days of filming on TNG: "Half a Life".
- Pocket TOS #53: Ghost-Walker by Barbara Hambly is published by Pocket Books.
- DC TNG volume 2 #16: "I Have Heard the Mermaids Singing" is published.
March
- 1 March - 7 March - Five days of filming on TNG: "Half a Life".
- 11 March - TNG: "Galaxy's Child" airs.
- 18 March - TNG: "Night Terrors" airs.
- UK VHS releases: TOS volumes 39 and 40 (end).
- 20 March - 28 March - Seven days of filming on TNG: "The Mind's Eye".
- 25 March - TNG: "Identity Crisis" airs.
- DC TNG volume 2 #17: "Forbidden Fruit" is published.
April
- 1 April - TNG: "The Nth Degree" airs.
- UK VHS release: TNG volume 10.
- 1 April - 9 April - Seven days of filming on TNG: "In Theory".
- 4 April - The visual effects unit at Image G filmed the solar surface and effects scenes for TNG: "Redemption II".
- 8 April - UK VHS release: TNG volume 11.
- 9 April - An additional scene for TNG: "The Mind's Eye" was filmed on Paramount Stage 9. The final draft script for TNG: "Redemption" is submitted.
- 10 April - Paul Stader and Kevin Peter Hall die.
- 10 April - 18 April - Seven days of filming on TNG: "Redemption".
- 11 April - Publicity photo shoot for Gene Roddenberry at the transporter room set.
- 16 April - Filming begins on Star Trek VI: The Undiscovered Country.
- 18 April - Second unit shots and inserts were filmed for TNG: "Half a Life", TNG: "The Host", TNG: "The Mind's Eye", and TNG: "In Theory".
- 22 April - TNG: "Qpid" airs.
- 23 April - Rudy Solari dies.
- 29 April - TNG: "The Drumhead" airs.
- Pocket TOS #54: A Flag Full of Stars by Brad Ferguson is published by Pocket Books.
- DC TNG volume 2 #18: "The Weapon" is published.
May
- 6 May - TNG: "Half a Life" airs.
- 7 May - UK VHS releases: TNG volumes 12 and 13 (end season 1).
- Release on a Tuesday instead of the usual Monday due to May Bank Holiday.
June
Star Trek's 25th Anniversary on 6 June 1991.
- 3 June - TNG: "In Theory" airs.
- UK VHS releases: TNG volumes 14 and 15.
- 6 June - An official ceremony was held to dedicate the opening of the Gene Roddenberry building at the Paramount Studios to Gene Roddenberry.
- 17 June - TNG: "Redemption", the 100th episode of The Next Generation airs.
- 18 June - Chuck Couch dies.
- Pocket TOS #55: Renegade by Gene DeWeese is published by Pocket Books.
- Pocket TNG novel Boogeymen is published.
July
Star Trek VI: The Undiscovered Country
- 1 July - UK VHS releases: TNG volumes 16 and 17.
- 2 July - Filming ends on Star Trek VI: The Undiscovered Country.
- 8 July - 17 July - Eight days of filming on TNG: "Redemption II".
- 18 July - 26 July - Seven days of filming on TNG: "Darmok" including two days on location at Bronson Canyon.
- 26 July - Richard Tatro dies.
- 29 July - 31 July - Three days of filming on TNG: "Ensign Ro".
August
- 1 August - 6 August - Four days of filming on TNG: "Ensign Ro" including one day on location at Bronson Canyon.
- 5 August - Murray Golden dies. Insert shots for TNG: "Darmok" were filmed on location at Bronson Canyon.
- 6 August - Publicity photos of the main cast and Whoopi Goldberg were shot at Paramount Stage 8.
- 7 August - 15 August - Seven days of filming on TNG: "Silicon Avatar" including one day on location at the Golden Oak Ranch.
- 7 August - 8 August - The Directors Guild Educators Workshop visited the set of TNG: "Silicon Avatar".
- 8 August - Blue screen unit filming for TNG: "Darmok".
- 12 August - UK VHS releases: TNG volumes 18 and 19.
- 13 August - Entertainment Tonight journalists and photographers visited the set of TNG: "Silicon Avatar".
- 16 August - 27 August - Eight days of filming on TNG: "Disaster".
- 20 August - Irving A. Feinberg dies.
- 21 August - Jesse James Rutherford is born.
- 26 August - 2nd Unit insert shots were filmed for TNG: "Redemption II" and TNG: "Darmok" and blue screen shots were filmed for TNG: "Silicon Avatar".
- 28 August - 2nd Unit shots were filmed for TNG: "Darmok" and TNG: "Disaster".
- 28 August - 30 August - Three days of filming on TNG: "The Game".
- 29 August - A camera crew from CBS This Morning visited the set and interviewed the cast members.
- Pocket Books #56: Legacy by Michael Jan Friedman is published by Pocket Books.
September
- 2 September - UK VHS releases: TNG volumes 20 and 21.
- 3 September - 6 September - Four days of filming on TNG: "The Game".
- 9 September - 18 September - Eight days of filming on TNG: "Unification II".
- 11 September - Cave scenes for TNG: "Unification I" are filmed on Paramount Stage 16 before principle photography.
- 13 September - Cave scenes and scenes on the Romulan street for TNG: "Unification I" are filmed on Paramount Stage 16 before principle photography.
- 15 September - John Hoyt dies.
- 16 September - Scenes on the Klingon Bird-of-Prey for TNG: "Unification I" are filmed on Paramount Stage 5 before principle photography.
- 19 September - 26 September - Six days of filming on TNG: "Unification I".
- 23 September - "Redemption II", the first episode of the fifth season of Star Trek: The Next Generation, premieres.
- 27 September - One day of filming on TNG: "A Matter of Time".
- 28 September - Star Trek 25th Anniversary Special airs.
- 30 September - One day of filming on TNG: "A Matter of Time". TNG: "Darmok" airs.
- Unknown - The plans for Paramount Stage 9 are revised.
October
The title card of "Unification I and II".
- 1 October - 7 October - Five days of filming on TNG: "A Matter of Time".
- 3 October - 2nd Unit inserts were filmed for TNG: "Disaster" and TNG: "The Game".
- 7 October - TNG: "Ensign Ro" airs.
- UK VHS releases: TNG volumes 22, 23, and 24 (end season 2).
- 8 October - 16 October - Seven days of filming on TNG: "New Ground".
- 9 October - Thalmus Rasulala dies.
- 14 October - TNG: "Silicon Avatar" airs.
- 17 October - 28 October - Eight days of filming on TNG: "Hero Worship".
- 21 October - TNG: "Disaster" airs.
- UK VHS releases: TNG volumes 25, 26, and 27.
- 24 October - Star Trek creator Gene Roddenberry passes away at the age of 70, shortly after the 25th anniversary of his creation. The TNG episode "Hero Worship" is in production at the time, and the two-part episode "Unification I" and "Unification II" is dedicated to Roddenberry's memory.
- 28 October - TNG: "The Game" airs.
- 28 October - 31 October - Four days of filming on TNG: "Violations".
- 29 October - Second unit inserts are filmed for TNG: "Unification II" and TNG: "A Matter of Time".
November
- 1 November - 6 November - Four days of filming on TNG: "Violations".
- 4 November - Leonard Nimoy makes a crossover appearance as Spock on the TNG episode "Unification I", the first episode in a two-part event.
- UK VHS releases: TNG volumes 28, 29, and 30.
- 7 November - 15 November - Seven days of filming on TNG: "The Masterpiece Society".
- 11 November - TNG: "Unification II" airs.
- 18 November - TNG: "A Matter of Time" airs.
- 18 November - 26 November - Seven days of filming on TNG: "Conundrum".
- 25 November - Second unit and insert shots are filmed for TNG: "Hero Worship" and TNG: "Violations".
- 27 November - Additional scenes for TNG: "Violations" are filmed. The first scenes for TNG: "Power Play" are filmed.
- Pocket TOS #57: The Rift by Peter David is published by Pocket Books
- Unknown - The Star Trek Logs: An MTV Big Picture Special Edition airs.
December
- 2 December - UK VHS releases: TAS volumes 1 and 2, TNG volumes 31, 32, and 33.
- 2 December - 11 December - Eight days of filming on TNG: "Power Play".
- 6 December - Star Trek VI: The Undiscovered Country premieres in US theaters.
- 11 December - 20 December - Eight days of filming on TNG: "Ethics". It is the final episode to be filmed in 1991 and the production went into company holiday.
- 12 December - Second unit and insert shots are filmed for TNG: "The Masterpiece Society" and TNG: "Power Play".
- 19 December - Second unit and insert shots are filmed for TNG: "The Masterpiece Society", TNG: "Conundrum", and TNG: "Power Play".
Unknown
- UK VHS releases (Movies): Star Trek: The Motion Picture, Star Trek III: The Search for Spock (25th Anniversary rereleases), Star Trek V: The Final Frontier, and Star Trek: The Movies - 25th Anniversary Collectors Set.
Template:Eventbrowser